A. C. Roper

A. C. Roper Jr. (born November 6, 1963) is a retired United States Army lieutenant general and retired police officer who last served as the deputy commander of United States Northern Command and vice commander of the American element of the North American Aerospace Defense Command from 2021 to 2024. Before that, he served as the deputy commanding general of the United States Army Reserve Command (USARC) and prior to that, as deputy chief of the United States Army Reserve.

In his civilian career, Roper was chief of the Birmingham Police Department from 2007 to 2017. Roper's promotion makes him the first black United States Army Reserve lieutenant general.

Roper graduated from Phillips High School in Birmingham, Alabama and enrolled at the University of Alabama at Birmingham. He left the university after his sophomore year to join the Montgomery Police Department. Roper eventually completed a bachelor's degree at Troy State University. He later earned an M.S. degree in criminal justice from the University of Alabama and a Master of Strategic Studies degree from the U.S. Army War College.